Before placing your order please make sure of your correct finger size, Our rings are comfort fit on the inside of ring. This means there is a slight roundness to the inside of the ring allowing the center part to fit closer to the finger than the outer edges. If you don’t know which size fit you, You had better go to local jewelry store to measure your size, Our ring size is us standard size. If you are UK or Europe customer. Please go to below site to conversion your size:
http://en.wikipedia.org/wiki/Ring_size
"RING FOR LIFE" Lifetime Sizing Program Because tungsten are some of nature's hardest and strongest elements, you can rest assured that your new Ceramic, titanium or tungsten ring purchase will continue to provide you comfort and enjoyment for your entire lifetime. By choosing one of our Ceramic, titanium or tungsten rings, you've selected the industry's new standard for excellence, noted for it's enduring styling, quality and craftsmanship and exclusive Lifetime Sizing policy.

When you receive your new ring from "Earrings-jewelry.net" simply save a copy of your invoice. Then relax, knowing that no matter how much your finger size changes over time, our Lifetime Sizing program will insure that your tungsten ring will always fit comfortably. Should you ever find your tungsten ring to be either too large or too tight due to fluctuation in finger size, simply return it to us along with a copy of your invoice. Our program will provide a replacement ring promptly and your correct adjusted size.
Conversion chart for ring sizes